Hydrocarbon-burner.



10.111111111101111. HYDROGARBON BURNER. APPLIOATIONIILED 0O'l'.l8, 1907.

Patented June 6, 1911.

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' HYDROCARBON BURNER. APPLICATION FILED 001218, 1907.

994,1 1?, Patented June 6,1911.

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ALEXANDER O. BRADFORD, 0F BOSTON, MASSACHUSETTS.

HYDROGARBON-BURNER.

Specification of Letters Patent.

Patented June 6, 1911.

Application filed October 18, 1907. Serial No. 398,016.

To all whom it may concern:

Be it known that I, ALEXANDER O. BRAD- FORD, a citizen of the UnitedStates, residing in Boston, county of Sufiolk, and State ofMassachusetts, have invented an Improvement in Hydrocarbon-Burners, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

This invention relates to a hydrocarbon vapor generator, especiallydesigned and adapted for generating vapor in sufficient quantity to beused in a separate burner.

The invention among other uses, is adapted for generating hydrocarbonvapors for use in blast or blow torches of great heating power andespecially for use in brazing cast iron or other metals. For thispurpose, I employ a main generator, a burner for heating said maingenerator, an auxiliary generator for supplying vapor to said burner,and an auxiliary burner for heating said auxiliary generator. The maingenerator and the auxiliary generator may and preferably will beconnected with a single source of oil supply, and provision is made forindependently controlling the flow of oil to said generators. The maingenerator is arranged with relation to the burner which heats it, sothat the generator may be highly heated when not in use, whereby it ismaintained in condition for instant use as will be described. Provisionis also made for arranging the generators and burners in a portableapparatus, which is provided wit-h means for protecting the workman fromthe heat of the burners. These and other features of this invention willbe pointed out in the claims at the end of this specification.

Figure 1 is an elevation of a portable apparatus embodying thisinvention. Fig. 2, an enlarged vertical section of the apparatus shownin Fig. 1, and Fig. 3, a sectional detail to be referred to, taken onthe line 3-3, Fig. 2.

In the present instance I have shown the invention as embodied in aportable blast or blow torch having the blast pipe or nozzle a supportedby uprights b, c from a base plate or platform at, which is supported bya stand 6 having a hollow upright f, in which is adjustably secured asby the screw g, a

spindle or rod h, to which is fastened a cross bar 2' connect-ing arms jsecured to the platform cl. The blast nozzle or pipe or has cooperatingwith it a vapor nozzle 5 provided with a needle valve 6 and detachablysecured to the end of one leg 7 of a U-shaped pipe 8, having its otherleg 9 detachably connected to a pipe 10, preferably provided with a coil12 and joined to a main supply 13 leading to a tank or reservoir 14containing kerosene or like oil under pressure. The U-shaped pipe 8constitutes the main vapor generator of the apparatus and its legs 7 9,are extended up through the base or platform {Z and through the top of acasing 15 erected upon said base. TVit-hin the casing 15 the legs 7, 9of the main generator have cooperating with them burners, which areherein shown as each composed of two pipes 16, 17 on opposite sides ofeach leg of the main generator and having perforations or vapor outlets18 arranged opposite the leg with which the burner pipes cooperate. Thepipes 16, 17

are closed at their lower ends and communicate at their upper ends witha pipe or chamber 20 located substantially at right angles to the burnerpipes 16, 17, and extended through one side wall of the casing 15. Thepipe or chamber 20 is closed at one end within the casing 15 and isprovided out-side of said casing with a depending section or branch 21,into which is extended the upper end of an auxiliary generator orvaporizer 22, which may be of any suitable construction and such as nowcommonly used on hydrocarbon lamps, said Vaporizer having at its upperend a vapor outlet which is controlled by a needle valve 25, and havingconnected to its lower end an oil supply pipe 26, which is shown asconnected with the oil supply pipe 13. The branch pipe 21 is alsoprovided with suitable air inlets 30 (see Figs. 2 and 3).

The vaporizer 22 has cooperating with it a burner, herein shown as apipe or tube 31 closed at its lower end and communlcatlng at its upperend with the pipe or chamber 21, the pipe 31 having perforations 33which through a cup 36, which is designed to contain alcohol by whichthe vaporizer is initially heated.

The oil pipes 10, 26 may and preferably will be provided with suitablevalves 38, 39 by which the supply of oil to the main gen-- erator and tothe auxiliary generator or vaporizer may be separately controlled.

The casing 15 may and preferably will be provided with alining 40 ofasbestos or like material, and the walls of said casing may be providedwith air-inlet openings 11 and the pipe or casing 35 may also beprovided with air-inlet openings 4-2 and with a flame outlet 43 whichregisters with a flame inlet opening a l in a side wall of the casing15. The casing 15 forms a combustion chamber for the main burner, andthe pipe or casing 35 forms a combustion chamber for the auxiliaryburner.

In operatic-n with the apparatus herein shown, oil is supplied to thevaporizer 22 by opening the valve 39, and said oil is initiallyvaporized by igniting alcohol in the cup 36. The vapor thus generatedpasses into the branch pipe 21 and is admixed with air drawn into saidpipe through the air inlets 30. The mixture thus formed fills the pipe20 and some of the mixture flows back through the auxiliary burner 31and issuing from the perforations thereof is ignited by the flame fromthe alcohol cup and serves to heat the auxiliary generator and vaporizethe oil therein. Another portion of the mixture passes through the mainburners 16, 17 into the chamber 15 where it is ignited by the flame inthe combustion chamber 35, said flame passing through the ports 43, 4 1.The main burners 16, 17 highly heat the two legs 7, 9, of the mainvaporizer or generator, and by opening the valve 38, oil is nowpermitted to flow through the pipe 10 and its coil 12 into the leg 9,wherein it descends and is highly heated and vaporized. The vapor passesfrom the leg 9 into the leg 7, up through which it ascends and issuesfrom the nozzle 5 into the blast pipe or torch a, where it is mixed withair drawn into said pipe. The mixture thus formed is ignited by hand andthe flame issues from the pipe or torch at a high heat suflicient forbrazing heavy metals such as cast iron. The oil supplied to the maingenerator may be cut off, when the blast is not being used, by means ofthe Valve 38, while the oil supply for the auxiliary generator orvaporizer may be maintained so as to furnish the main burners with fueland thereby maintain the main generator highly heated and in conditionto vaporize the oil when the valve 38 is again opened. It will also beseen that the vapor generated in the leg 9 is practically superheated inthe leg 7 of the main generator, and that this vapor can be ignited inclose proximity to the nozzle 5, or said vapor by reason of its highlyheated condition can be carried to a point substantially remote from thegenerator.

lVith the apparatus herein shown, a flame having a temperature of 2500F. has been obtained.

I have herein shown the invention as embodied in a portable apparatus,but I do not desire to limit my invention in this respect.

The legs 9, 7 of the main generator are detachably connected with thesupply pipe 1.0 and nozzle 5, which enables the said generator to bereadily removed from the apparatus for purposes of repair or renewal,without interfering with the operation of the main burner. The supplypipe 10 for the main generator or vaporizer, may and preferably will beprovided with the coil 12, which is located in proximity tothe casing 35so as to be heated thereby, which arrangement serves to heat the oilsupplied to the main generator before it reaches the said generator. Thelegs 7, 9 of the main generator pass as herein shown through tubes 50extended transversely of the pipe 20.

I have herein shown one construction of apparatus embodying thisinvention, but I do not desire to limit my invention to the particularconstruction shown.

Claims:

1. In an apparatus of the character described, in combination, ahydrocarbon vapor generator comprising a substantially U-shaped pipe, anozzle connected with one leg of said pipe, an oil supply pipe connectedwith the other leg of said pipe, and means to control the supply of oilto said generator, a burner cooperating with each leg of the saidgenerator, a mixing chamber with which said burners are connected, anauxiliary generator communicating with said mixing chamber, an oilsupply pipe connected with said auxiliary generator, means to controlthe supply of oil to said auxiliary generator, an auxiliary burnerconnected with said mixing chamber and cooperating with said auxiliarygenerator, substantially as described.

2. In an apparatus of the character described, in combination, ahydrocarbon vapor generator comprising a substantially U-shaped pipe, anozzle connected with one leg of said pipe, an oil supply pipe connectedwith the other leg of said pipe, means to control the supply of oil tosaid generator, a burner cooperating with each leg of the saidgenerator, a mixing chamber with which said burners are connected, anauxiliary generator communicating with said mixing chamber, an oilsupply pipe connected with said auxiliary generator, means to controlthe supply of oil to said auxiliary generator, an auxiliary burnerconnected with said mixing chamber and cooperating with said auxiliarygenerator, a casing inclosing said main burners, and a casing in closingsaid auxiliary burner and communicating with the casing for said mainburner, substantially as described.

3. In an apparatus of the character described, in combination, a vaporgenerator, an oil supply connected therewith, means to control said oilsupply, a burner for heating said generator, a mixing chamber for airand vapor with which said burner is connected, an auxiliary generatorcommunicating with said mixing chamber to supply vapor thereto, anauxiliary burner connected with said mixing chamber and cooperating withsaid auxiliary generator, an oil supply for said auxiliary generator,and means to control the supply or oil to said auxiliary generatorindependently of said main generator, substantially as described.

4. In an apparatus of the character described, in combination, aplatform, a casing supported thereon, a main vapor generator havingconnected upright legs extended through said casing, burners located insaid casing and cooperating with said legs, a pipe in said casing withwhich said burners are connected, a branch pipe located outside of saidcasing and connected with the pipe within said casing, an auxiliaryvapor generator communicating with said branch pipe, an auxiliary burnerconnected with said branch pipe and cooperating with said auxiliarygenerator, a casing for said auxiliary generator and its burner, oilsupply pipes connected with said main and auxiliary vapor generators,valves controlling said oil supply pipes, and an air blast pipesupported by said platform and cooperating with said main generator,substantially as described.

5. In an apparatus of the character described, in combination, a mainhydrocarbon vapor generator, a burner for heating said main generator,an auxiliary generator for supplying said burner with hydrocarbon vapor,oil supply pipes connected with said main and auxiliary generators andmeans for controlling the flow of oil through said pipes to saidgenerators independently of each other, substantially as described.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

ALEXANDER O. BRADFORD.

Witnesses JAs. H. CHURCHILL, J. MURPHY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

